<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="goodAll" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <Goods v-for="(item, index) in goodList" :key="index" :uname="item.name" :price="item.price" :num="item.num" :checked="item.checked" :goodList="item" @reduce="reduce" @add="add" :index="index" :goodListArr="goodList" />
      </tbody>
      <tfoot>
        <Total :goodListArr="goodList" />
      </tfoot>
    </table>
  </div>
</template>

<script>
import Goods from './components/Goods.vue'
import Total from './components/Total.vue'
export default {
  data() {
    return {
      goodList: [
        {
          name: '诸葛亮',
          price: 1000,
          num: 1,
          checked: false
        },
        {
          name: '蔡文姬',
          price: 1500,
          num: 1,
          checked: false
        },
        {
          name: '妲己',
          price: 2000,
          num: 1,
          checked: false
        },
        {
          name: '鲁班',
          price: 2200,
          num: 1,
          checked: false
        }
      ]
    }
  },
  methods: {
    reduce(i) {
      if (this.goodList[i].num == 0) return
      this.goodList[i].num--
    },
    add(i) {
      this.goodList[i].num++
    }
  },
  components: {
    Goods,
    Total
  },
  computed: {
    goodAll: {
      get() {
        return this.goodList.every((item) => item.checked)
      },
      set(val) {
        this.goodList.forEach((item) => {
          item.checked = val
        })
      }
    }
  }
}
</script>

<style></style>
